drop table if exists x; create table x (i UInt64, j UInt64, k UInt64, projection agg (select sum(j), avg(k) group by i), projection norm (select j, k order by i)) engine MergeTree order by tuple(); insert into x values (1, 2, 3); set allow_experimental_projection_optimization = 1, use_index_for_in_with_subqueries = 0; select sum(j), avg(k) from x where i in (select number from numbers(4)); select j, k from x where i in (select number from numbers(4)); drop table x;